Abstract
Small-angle scattering from two-phase isotropic systems requires the scattering to be invariant to determine the relative fractions of each phase in the material. For anisotropic systems the measurement yields a result that depends on the projection of the phases onto the scattering plane, normal to the incident radiation. When the scattering system has a unique axis such that there is no preferred direction in the plane normal to that axis, the scattering gives elliptical contours on the two-dimensional detector. Two different measurements of projected phases, one with the incident beam direction coincident with the unique axis and the other normal to that axis, can be combined to give a threedimensional description of the system and therefore lead to a determination of the total porosity of the system.
| Original language | English |
|---|---|
| Pages (from-to) | 175-184 |
| Number of pages | 10 |
| Journal | Journal of Applied Crystallography |
| Volume | 51 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2018 |
| Externally published | Yes |
Funding
Access to the small-angle neutron scattering instruments was provided by the Center for High-Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under agreement No. DMR-1508249. XG acknowledges support for the use of neutron scattering in the analysis of rock porosity by the US Department of Energy, Basic Energy Sciences, grant No. DE-FG02-OSER15675 to S. L. Brantley, and by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle LLC for the US Department of Energy.
Keywords
- azimuthal asymmetric scattering
- fractals
- porosity
- small-angle neutron scattering